#include <stdio.h>

#define PI 3.141592654

double area(double r){
  return PI * r * r;
}

double circumference(double r){
  return 2.0 * PI * r;
}

double volume(double r){
  return 4.0 / 3.0 * PI * r * r * r;
}

int main(int argc, char const *argv[]) {
  printf("radius = %g; area = %.4f; circumference = %.4f; volume = %.4f\n", 1.0, area(1.0), circumference(1.0), volume(1.0));
  printf("radius = %g; area = %.4f; circumference = %.4f; volume = %.4f\n", 4.98, area(4.98), circumference(4.98), volume(4.98));
  return 0;
}
